US 11,940,215 B2
Blast furnace apparatus and operation method for blast furnace
Yusuke Kashihara, Tokyo (JP); Yuki Okamoto, Tokyo (JP); and Natsuo Ishiwata, Tokyo (JP)
Assigned to JFE STEEL CORPORATION, Tokyo (JP)
Appl. No. 17/040,537
Filed by JFE STEEL CORPORATION, Tokyo (JP)
PCT Filed Mar. 25, 2019, PCT No. PCT/JP2019/012586
§ 371(c)(1), (2) Date Sep. 23, 2020,
PCT Pub. No. WO2019/189025, PCT Pub. Date Oct. 3, 2019.
Claims priority of application No. 2018-062433 (JP), filed on Mar. 28, 2018.
Prior Publication US 2021/0041172 A1, Feb. 11, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. F27B 1/28 (2006.01); B65G 11/20 (2006.01); C21B 7/18 (2006.01); F27B 1/20 (2006.01); F27D 3/00 (2006.01); F27D 3/10 (2006.01); G01S 13/89 (2006.01)
CPC F27B 1/28 (2013.01) [B65G 11/206 (2013.01); C21B 7/18 (2013.01); F27B 1/20 (2013.01); F27D 3/0024 (2013.01); F27D 3/0031 (2013.01); F27D 3/10 (2013.01); G01S 13/89 (2013.01); B65G 2201/045 (2013.01); B65G 2203/02 (2013.01); B65G 2203/042 (2013.01); F27D 2003/0075 (2013.01); F27D 2003/0089 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A blast furnace apparatus comprising:
a rotating chute configured to charge a raw material into a blast furnace from a blast furnace top;
a profile measurement device configured to measure surface profiles of a burden charged into the blast furnace through the rotating chute; and
a tilt angle controller configured to control a tilt angle of the rotating chute, wherein
the profile measurement device comprises a radio wave distance meter, which is installed on the blast furnace top and configured to measure a distance to the surface of the burden in the blast furnace, and derives the surface profiles of the burden on a basis of distance data for the entire blast furnace related to distances to the surface of the burden obtained by scanning a detection wave of the radio wave distance meter in the blast furnace in a circumferential direction;
the profile measurement device comprises at least one of
an arithmetic unit configured to command, on a basis of the surface profiles obtained, the tilt angle controller to change the tilt angle of the rotating chute during rotation,
an arithmetic unit configured to command, on a basis of the surface profiles obtained, a speed controller to change a rotational speed of the rotating chute during rotation, or
an arithmetic unit configured to command, on a basis of the surface profiles obtained, a speed controller to change a feed speed of the burden fed to the rotating chute during rotation; and
the profile measurement device further comprises an arithmetic unit configured to calculate a descent speed of the burden over an entire circumference of the blast furnace on a basis of the surface profiles of the burden.